642 US gallons in US dry barrels
Conversion
642 US gallons is equivalent to 21.0178571428571 US dry barrels.[1]
Conversion formula
How to convert 642 US gallons to US dry barrels?
We know (by definition) that:
We can set up a proportion to solve for the number of US dry barrels.
Now, we cross multiply to solve for our unknown :
Conclusion:
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US dry barrel is equal to 0.0475785896346644 times 642 US gallons.
It can also be expressed as: 642 US gallons is equal to US dry barrels.
Approximation
An approximate numerical result would be: six hundred and forty-two US gallons is about twenty-one point zero one US dry barrels, or alternatively, a US dry barrel is about zero point zero five times six hundred and forty-two US gallons.
Footnotes
[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).
Results may contain small errors due to the use of floating point arithmetic.